import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/User.vue'


Vue.use(VueRouter)

const routes = [
  { path:'/',redirect:'/login' },
  { path:'/login',component:Login },
  { path:'/home',
  component:Home,
  redirect:'/welcome',
  children:[
    { path:'/welcome',component:Welcome },
    { path:'/users',component:Users}
  ] }
  
 
]

const router = new VueRouter({
  routes
})

//挂在路由导航守卫

router.beforeEach((to,from,next)=>{
// to 将要访问的路径
// from代表从哪个路径跳转而来
// next是一个函数表示放行
      if(to.path === '/login') return next();
        // 获取token
      const tokenStr = window.sessionStorage.getItem('token')
      if(!tokenStr) return next('/login')
      next()

})
export default router
